Drain mechanism for car-heaters



(No Model.)

R. M. DIXON. DRAIN MEGHANISM PoR GAR HBATBRS.

ANDREW B RAIIAM.FHUTO-LI'TNuWASHINGON. n.5.

UNITED STATES PATENT OFFICE.

ROBERT MUN N DIXON, OE EAST ORANGE, NEV JERSEY, ASSIGNOR TO THE SAFETY OAR HEATING AND LIGHTING COMPANY, OE NEW JERSEY.

SPECIFICATION forming part of Letters Patent No. 551,182, dated December 10, 1895. Application filed October 18, 1892. Serial No. 449,267. (No model.)

To all whom it may concern:

Be it known that I, ROBERT MUNN DIXON, of East Orange, county of Essex, and State of New Jersey, have invented 'certain new and useful Improvements in Drain Mechanism for Car-Heaters, of which the following is a specification, reference being had 'to the accompanying drawings.

The object of my invention is to produce a simpliiied form of drain-tip for a steam carheater, which may be manufactured and operated at less expense than those at present in common use.

My invention is designed to be used in connection with that class of car-heaters in which steam from the locomotive or other source is passed throughL radiators within the car-as, for example, shown in my Patent No. 435,484.

In the accompanying drawings, Figure l is a plan view of an individual car-heating system shown as attached to a train-pipe as in use. Eig. 2 is a side elevation of the same shown as attached to the iioor of a car. Fig. 3 is a detail sectional view of an open draincock. Fig. 4 is a detail sectional view of one of the three-way valves.`

Referring to the figures ou the drawings, l indicates a train-pipe or main supply-pipe provided with train-pipe cocks 2. The trainpipe in use passes underneath the floor 4 of a car and communicates with the source of steam-supply.

5 indicates branch supply-pipes communieatin g with valve-castin gs 6, preferably two in number, located on opposite sides of the car to supply its local heating-pipes. The valvecasting is provided with suitable controllingvalves-as, for example, a three-way valveof any suitable and well-known construction adapted to convey steam from the supply-pipe to one or both of the local heating-pipes 8 and 9, which communicate at one end with the interior of the valve-casting and terminate in drain-tips 10. The local heating-pipes are plain straight pipes without special attachments of any sort, and in practice drain from one end of the car to the other. The draintips are constructed as illustrated in Fig. 3 of the drawings, in which 11 indicates a connecting-piece, screw-threaded in suitable manner-for example, as illustrated for uniting the drain-tips to the local heating-pipes. The connecting-piece is provided with a conical interior wall 12. In practice the apex of the cone is upward, and is pierced with a small aperture 13, an annular flange constituting an extension of the connection or body part 11 surrounding the cone, as illustrated.

14 indica-tes a screen made of suitable material-as,for instance,brass-wire cloth-supported by the annular Iiange at the apex of the conical wall and preventing closure of the aperture by waste material or dirt in the pipes.

The construction of the drain-tips above described reduces the liability to scale-clogging to the minimum and insures the arrest of such dbris as would interfere with theiroperation.

The operation of my device is as follows: Steam being admitted into the branch supply-pipes, the three-way valve is set as required to supply the local heating-pipes with steam. The steam lls the pipes and its water of condensation is drained toward one end of the pipe, and is carried off through the drain-tips. By reason of the simplicity of my device the local heating-pipes may be made free of all checking or reducing contrivance, and may be made to drain throughout their entire length in the simplest possible manner.

What I claim is A drain tip consisting of an internally screw threaded body part, an internal conical wall thereabove provided with an aperture at its apex, an externally-threaded annular flange surrounding the conical wall, and a screen sustained by the annular flange and covering the aperture in the conical wall, whereby the tip is readily detachable from the heating and drain pipes for cleansing, substantially as specified.

In testimony of all which I have hereunto subscribed my name.

ROBERT MUNN Dixon.

Witnesses:

RoBT. P. BROWN, OSCAR C. WHITNEY. 

